Mitsubishi Electric CLIMAVENETA Series General Manual For Installation page 27

C0210101-07-16-EN
cooled and preferably from the inside outwards). See
para. 12.3.
Check the cleanliness of the shell and tube exchangers
and clean them if necessary (swabbing can damage the
internal scoring of the pipes: use appropriate chemical
products)
Check evaporator resistance operation
Check horizontal unit positioning
Check the presence of rusting on the cooling circuit
especially as regards pressure vessels. Apply
appropriate surface protection if necessary.
General unit cleaning
Vent the water circuit and heat exchangers (the
combination of fluid and air reduces performance and
can cause corrosion)
Measure overheating temperature value
Measure overcooling temperature value
Measure compressor discharge gas temperature value
Measure low pressure value
Measure high pressure value
Measure fan absorption, 3 phases (L1, L2, L3) or single
phase where single-phase fans present
Measure compressor absorption, 3 phases (L1, L2, L3)
Measure pump absorption where fitted on the machine,
3 phases (L1, L2, L3)
Measure outdoor air temperature
Measure evaporator and condenser inlet and outlet
water temperature where fitted
Check oil level
Check oil acidity
Check oil cleaning
Replace oil
Check correct operation of compressor oil case
resistance
Check dielectric rigidity
Check correct operation of oil level sensor (where fitted)
Check/replace the bearings of the screw compressor
Check and calibrate correct operation of evaporator flow
switch and condenser/recuperator
Check operation of water differential pressure switch
Check tightening of shell and tube exchanger heads
Check rotating seal / pump gaskets
Check concentration of glycol solution where
appropriate
Check and clean water filter at water heat exchanger
inlet
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
27
Screw compressor:
8000 hours
Scroll compressor:
12000 hours
Piston compressor:
5000 hours
150000 hours